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2 years ago

I need an answer now please asap and you will me marked brainiest please it's missing I need it now.

Chemistry

1 answer:

olya-2409 [2.1K]2 years ago

8 0

Hope this helps message me if you need help understanding it

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A solution that contains 3 grams of solute dissolved in 100 millimeters of solution is:

xxTIMURxx [149]

Answer:

the answer is correct part another is a part

Explanation:

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2 years ago

A particular energy level in the hydrogen atom has E = -2.42 x 10-19 J. Use Bohr's model of the energy levels in hydrogen to cal

Zepler [3.9K]

Answer:

n=3

Explanation:

The expression for the energy of an electron for the hydrogen atom in the nth orbit is:-

$E_n=-2.18\times 10^{-18}\times \frac{1}{n^2}\ Joules$

Given that:-

$E_n=-2.42\times 10^{-19}\ Joules$

Applying in the equation to find the value of n as:-

$-2.42\times 10^{-19}=-2.18\times 10^{-18}\times \frac{1}{n^2}$

$n^2=\frac{2.18\times 10^{-18}}{2.42\times 10^{-19}}$

$n=\sqrt{\frac{21.8}{2.42}}=3$

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3 years ago

Explain why glacial deposits have been found in Africa?

aliya0001 [1]

Glaciers were found in Africa because continents were connected and party covered with snow near the south pole long ago.

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2 years ago

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When patterning a shotgun, what is a sufficient percentage of pellets within a 30-inch circle? at least 25% of the load, concent

Murrr4er [49]

<span>According to state hunter's education standards, your shotgun pattern within a 30 inch circle should be concentrated in the center at least 55% of the load, with even distribution.</span>

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3 years ago

Periods On the periodic table represent elements

Natalka [10]

Answer:When you look at the periodic table, each row is called a period (Get it? Like PERIODic table.). All of the elements in a period have the same number of atomic orbitals. For example, every element in the top row (the first period) has one orbital for its electrons.

Explanation:

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2 years ago